AADC	aromatic L-amino acid decarboxylase
AAV	adeno-associated viral
ALDH	aldehyde dehydrogenase
AR	aldehyde reductase
BH4	tetrahydrobiopterin
CD	cysteinyldopa
CDA	cysteinyldopamine
COMT	catechol-O-methyltransferase
DA	dopamine
DAC	dopaminechrome
DAQ	dopaminequinone
DBH	dopamine-β-hydroxylase
DC	dopachrome
DDC	dopa decarboxylase
DHI	5,6-dihydroxyindole
DHICA	5,6-dihydroxyindole-2-carboxylic acid
DQ	dopaquinone
DOMA	3,4-dihydroxymandelic acid
DOPA	3,4-dihydroxyphenylalanine
DOPAC DOPAL	3,4-dihydroxyphenylacetic acid 3,4-dihydroxyphenylacetaldehyde
DOPEG	3,4-dihydroxyphenylethylene glycol
DOPEGAL	3,4-dihydroxyphenylglycolaldehyde
DOPET	3,4-dihydroxyphenylethanol
EM	eumelanin
EN	epinephrine
euNM	eumelanic NM
HVA	homovanillic acid
LBD	Lewy body disease
LC	locus coeruleus
MAO	monoamine oxidase
MHPG	3-methoxy-4-hydroxyphenylgycol
MN	metanephrine
MOPAL	3-methoxy-4-hydroxyphenylacetaldehyde
MOPEG	3-methoxy-4-hydroxyphenylethyleneglycol
MOPET	3-methoxy-4-hydroxyphenylethanol
MOPEGAL	3-methoxy-4-hydroxyphenylglycolaldehyde
MPTP	1-phenyl-4-methyl-1,2,3,6-tetrahydropyridine
MSA	multiple system atrophy
NE	norepinephrine
NEQ	NEquinone
NM	neuromelanin
PD	Parkinson’s disease
fPD	familial Parkinson’s disease
sPD	sporadic Parkinson’s disease
pheoNM	pheomelanic NM
PNMT	phenylethanolamine N-methyltransferase
PM	pheomelanin
RBD	REM-sleep behavioral disorders
ROS	reactive oxygen species
5SCD	5-S-cysteinyldopa
2SCD	2-S-cysteinyldopa
SN	substantia nigra
SNCA	alpha-Synuclein gene
SNpc	substantia nigra pars compacta
TH	tyrosine hydroxylase
Tyr	tyrosinase
Tyrp1	tyrosinase-related protein 1
Tyrp2	tyrosinase-related protein 2
VMA	vanillylmandelic acid
VMAT-2	vesicular monoamine transporter-2